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PORichface: a4j:mediaOutput, data is 'null'
 

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    <p>I'm getting nullpointer when i try to display an image i upload.</p> <p>I follow the example from: <a href="http://showcase.richfaces.org/richfaces/component-sample.jsf?demo=fileUpload" rel="nofollow">Richfaces Showcase</a></p> <p>Error: <strong>javax.el.ELException: ...[path]... createContent="#{imageBean.paint}": java.lang.NullPointerException</strong> </p> <p>Used source code:</p> <p><strong>ImageBean.java</strong></p> <pre><code>@ManagedBean @SessionScoped public class ImageBean implements Serializable{ private ImageData imageData= new ImageData(); public void listener(FileUploadEvent event) throws Exception { UploadedFile item = event.getUploadedFile(); imageData = new ImageData(); imageData.setName(item.getName()); imageData.setData(item.getData()); } public void paint(OutputStream stream, Object object) throws IOException { stream.write(getFile().getData()); stream.close(); } // getters and setters for file </code></pre> <p><strong>uploadImage.xhtml</strong></p> <pre><code>&lt;h:form&gt; &lt;h:panelGrid columns="2" columnClasses="top,top"&gt; &lt;rich:fileUpload fileUploadListener="#{imageBean.listener}" id="upload" acceptedTypes="jpg, gif, png, bmp" ontyperejected="alert('Only JPG, GIF, PNG and BMP files are accepted');" maxFilesQuantity="1"&gt; &lt;a4j:ajax event="uploadcomplete" execute="@none" render="info" /&gt; &lt;/rich:fileUpload&gt; &lt;h:panelGroup id="info" layout="block"&gt; &lt;rich:panel bodyClass="info"&gt; &lt;f:facet name="header"&gt; &lt;h:outputText value="Uploaded Files Info" /&gt; &lt;/f:facet&gt; &lt;h:outputText value="Geen foto beschikbaar" rendered="#{imageBean.size==0}" /&gt; &lt;a4j:mediaOutput element="img" mimeType="image/jpeg" createContent="#{imageBean.paint}" value="#{imageBean.file.name}" style="width:100px; height:100px;" cacheable="false"&gt; &lt;/a4j:mediaOutput&gt; &lt;h:panelGrid columns="2"&gt; &lt;h:outputText value="File Name:" /&gt; &lt;h:outputText value="#{imageBean.file.name}" /&gt; &lt;/h:panelGrid&gt; &lt;/rich:panel&gt; &lt;br /&gt; &lt;/h:panelGroup&gt; &lt;/h:panelGrid&gt; &lt;/h:form&gt; </code></pre> <p>According to my debugger: imageDate gets data in the upload <strong>listener()</strong> but is null in the <strong>paint()</strong></p> <p>My thought would be then that i should put my scope bigger. So I have set it to <strong>@SessionScoped</strong></p> <p><strong>Web.xml</strong>:</p> <pre><code>&lt;context-param&gt; &lt;param-name&gt;createTempFiles&lt;/param-name&gt; &lt;param-value&gt;false&lt;/param-value&gt; &lt;/context-param&gt; </code></pre> <p>I have tried both true and false</p> <p>Using Richfaces: 4.3.2</p>
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